I installed magix pro on a new computer. I deactivated the old and activated new. This all worked fine. Now I want to load the old movie and it want me to activate the mp4 codex and when I do this I get a message that this code is registered under a different e-mail. What can i do? I changed my login info to a new e-mail after I got the new computer. Do I need to reverse this to get the codex?